Vacuum cleaner



FIG. 1 is a front perspective view of a vacuum cleaner showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is an enlarged top view of the vacuum cleaner;

FIG. 6 is an enlarged view of the vacuum cleaner shown within the area designated as 6 in FIG. 1; and,

FIG. 7 is an enlarged view of the vacuum cleaner shown within the area designated as 7 in FIG. 2.

The details of the vacuum cleaner shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 